[vbox-dev] USB EHCI support under Windows
Hans Petter Selasky
hselasky at c2i.net
Fri Aug 19 08:02:12 PDT 2011
On Friday 22 July 2011 18:06:00 Hans Petter Selasky wrote:
> There appears to be a bug when cancelling USB transactions (removing them
> from the EHCI schedule) on endpoints using the USB 2.0 mode, that the USB
> device is automatically re-enumerated. Who is responsible for this part?
> Is there any support available?
Investigating this issue more properly, I see that VirtualBOX returns an error
code when the Emulated OS tries to clear the stall on any endpoints. This in
turn cause the Emulated OS (FreeBSD) to re-enumerate the device.
Is this a bug or feature in VirtualBOX. Shouldn't clear-stall allways succeed,
even if the data toggle value is not cared about?
Fix for FreeBSD:
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